Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
Verfahren zum Aussteuern von Schraubennaht-Rohrwerken, insbesondere solchen, in denen Rohre mit einem grossen Verhaeltnis von D:s herstellbar sind, sowie Vorrichtung zur Durchfuehrung des Verfahrens
Rolladen mit unverschliessbaren Lichtspalten aus Staeben rautenfoermigen querschnittes, die auf biegsamen, durch Schlitze der Staebe hindurchgehenden Tragbaendern gegeneinander unverschlieblich befestigt sind.